Since I'm procrastinating, I figured I'd answer those (no, I'm not a libertarian).
1.Most libertarians accept that children aren't mentally developed enough to take care of themselves. Therefore, parents are meant to act in their children's best interests. A libertarian would resist having the government tell them how to bring up their child as long as they provide it with the necessities though.
2. See point 1.
3. Probably in same category as children.
4. Most libertarians support a minimal military force.
5. The goal of that military force is to repel foreign invasions, not anything more.

